OFFSET
0,2
COMMENTS
In order to have A143496 as a lower triangular Sheffer matrix one uses row and column offsets 0 (not 4).
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..591
FORMULA
E.g.f.: exp(-exp(x)+4*x+1).
a(n) = exp(1) * Sum_{k>=0} (-1)^k * (k + 4)^n / k!. - Ilya Gutkovskiy, Dec 20 2019
a(0) = 1; a(n) = 4 * a(n-1) - Sum_{k=0..n-1} binomial(n-1,k) * a(k). - Seiichi Manyama, Aug 02 2021
EXAMPLE
With offset [0,0] row n=3 of A143496 is [64,61,15,1], hence a(3)=64-61+15-1=17.
PROG
(PARI) my(x='x+O('x^30)); Vec(serlaplace(exp(-exp(x)+4*x+1))) \\ Michel Marcus, Aug 02 2021
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Wolfdieter Lang, Oct 06 2011
STATUS
approved