OFFSET
0,4
LINKS
Peter Luschny, The Bell transform.
FORMULA
a(n) = (-2)^(n+1)*Euler(2*n+1, 0) - b(n) where b(n) is the sum of row 2*n + 1 of the Bell transform of n mod 2. The Bell transform is defined in A264428.
MAPLE
B := BellMatrix(n -> modp(n, 2), 37): # defined in A264428.
b := n -> add(k, k in B[2*n+1]):
seq(euler(2*n+1, 0)*(-2)^(n+1) - b(n), n=0..18);
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Aug 13 2019
STATUS
approved