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.

Showing 1-2 of 2 results.

A143059 A007318 * [1, 10, 25, 15, 1, 0, 0, 0, ...].

Original entry on oeis.org

1, 11, 46, 121, 252, 456, 751, 1156, 1691, 2377, 3236, 4291, 5566, 7086, 8877, 10966, 13381, 16151, 19306, 22877, 26896, 31396, 36411, 41976, 48127, 54901, 62336, 70471, 79346, 89002, 99481
Offset: 0

Views

Author

Gary W. Adamson, Jul 20 2008

Keywords

Examples

			a(4) = 121 = (1, 3, 3, 1) dot (1, 10, 25, 15) = (1 + 30 + 75 + 15).
		

Crossrefs

Programs

  • Mathematica
    LinearRecurrence[{5,-10,10,-5,1},{1,11,46,121,252},40] (* Harvey P. Dale, May 08 2020 *)

Formula

Binomial transform of [1, 10, 25, 15, 1, 0, 0, 0, ...] where (1, 10, 25, 15, 1) = row 5 of triangle A008278.
G.f. ( -1-6*x-x^2+9*x^3-2*x^4 ) / (x-1)^5 . - R. J. Mathar, Apr 04 2012

A143060 A007318 * [1, 15, 65, 90, 31, 1, 0, 0, 0, ...].

Original entry on oeis.org

1, 16, 96, 331, 842, 1782, 3337, 5727, 9207, 14068, 20638, 29283, 40408, 54458, 71919, 93319, 119229, 150264, 187084, 230395, 280950, 339550, 407045, 484335, 572371, 672156, 784746, 911251, 1052836, 1210722
Offset: 1

Views

Author

Gary W. Adamson, Jul 20 2008

Keywords

Examples

			a(3) = 96 = (1, 2, 1) dot (1, 15, 65) = (1 + 30 + 65).
		

Crossrefs

Formula

Binomial transform of [1, 15, 65, 90, 31, 1, 0, 0, 0, ...] where (1, 15, 65 90, 31, 1) = row 6 of triangle A008278.
G.f.: x*(1+10*x+15*x^2-25*x^3-9*x^4+9*x^5)/(1-x)^6. - Colin Barker, Feb 01 2012
Showing 1-2 of 2 results.