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A321958
Sums of antidiagonals of A321960.
2
1, 1, 2, 5, 15, 54, 227, 1085, 5774, 33679, 212807, 1443622, 10439565, 80016693, 646976322, 5496339141, 48894262619, 454113866430, 4392175247939, 44138842357617, 459956754593094, 4961220069886511, 55301147935270395, 636091223462294518, 7539926971001192381
OFFSET
0,3
LINKS
PROG
(Sage)
def A321958List(l):
def row(n, dim):
m = 1
for k in range(dim-1, -1, -1):
ax = (n+k)*x
m = 1 - ax - (ax*x)/m
return SR(1/m).series(x, dim).list()
return [sum(row(n-k, n+1)[k] for k in (0..n)) for n in (0..l-1)]
A321958List(16)
CROSSREFS
Cf. A321960.
Sequence in context: A185040 A369599 A208237 * A107112 A193318 A171450
KEYWORD
nonn
AUTHOR
Peter Luschny, Dec 27 2018
STATUS
approved