cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A369649 Numbers k in A276156 (sums of distinct primorial numbers) where the maximal exponent in the prime factorization of k attains a novel value.

Original entry on oeis.org

1, 2, 8, 9, 32, 240, 30272, 510720, 223635968, 6469693440, 6470203776, 200560520192, 200793823232, 304250487160832, 13082767811575808, 13090182069805056, 32602248665739755520, 1955964710091685625856, 117289009331951114780672, 557940862715864858896105472, 558058119122955571275235328, 40729680631838190048559235072
Offset: 1

Views

Author

Antti Karttunen, Feb 03 2024

Keywords

Examples

			                  k   factorization               max.exp         A049345(k)
                  1                                  0                 1
                  2 = 2^1,                           1,               10
                  8 = 2^3,                           3,              110
                  9 = 3^2,                           2,              111
                 32 = 2^5,                           5,             1010
                240 = 2^4 * 3 * 5,                   4,            11000
              30272 = 2^6 * 11 * 43,                 6,          1011010
             510720 = 2^8 * 3 * 5 * 7 * 19,          8,         10010000
          223635968 = 2^9 * 577 * 757,               9,       1011111110
         6469693440 = 2^12 * 3 * 5 * 7^3 * 307,     12,      10000010000
         6470203776 = 2^7 * 3 * 1151 * 14639,        7,      10010001100
       200560520192 = 2^10 * 43 * 4554881,          10,     100001001010
       200793823232 = 2^11 * 98043859,              11,     101111000010
    304250487160832 = 2^14 * 113 * 164336071,       14,   10001011010010
  13082767811575808 = 2^15 * 167 * 2390744843,      15,  100010110101110
  13090182069805056 = 2^13 * 3^4 * 5939 * 3321677,  13,  101000000010100.
Max. exp. column, which is equal to A051903(k) is most probably a permutation of nonnegative integers.
Note that the last column is equal to A007088(A369648(n)).
		

Crossrefs

Formula

a(n) = A276156(A369648(n)).