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.

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A270200 a(0) = 0; for n >= 1, a(n) = A054429(A005187(1+A054429(n-1))).

Original entry on oeis.org

0, 1, 2, 4, 7, 8, 12, 13, 15, 16, 21, 22, 24, 25, 28, 29, 31, 32, 38, 39, 41, 42, 45, 46, 48, 49, 53, 54, 56, 57, 60, 61, 63, 64, 71, 72, 74, 75, 78, 79, 81, 82, 86, 87, 89, 90, 93, 94, 96, 97, 102, 103, 105, 106, 109, 110, 112, 113, 117, 118, 120, 121, 124, 125, 127, 128, 136, 137, 139, 140, 143, 144, 146, 147, 151
Offset: 0

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Author

Antti Karttunen, May 31 2016

Keywords

Comments

After the initial zero, numbers that occur in the range of A233272.

Crossrefs

Complement: A270198.
Cf. also A233271 (a subsequence).

Programs

  • Mathematica
    s = Range[2^(# + 1) - 1, 2^#, -1] & /@ Range[0, 12] // Flatten; {0, 1}~Join~Table[s[[2 # - DigitCount[2 #, 2, 1] &[1 + s[[n - 1]]]]], {n, 2, 74}] (* Michael De Vlieger, Jun 01 2016, after Harvey P. Dale at A005187 and A054429 *)

Formula

a(0) = 0; for n >= 1, a(n) = A054429(A005187(1+A054429(n-1))).
Other identities. For all >= 0:
A233273(n) = a(n+2).
Showing 1-1 of 1 results.