OFFSET
0,3
FORMULA
a(0) = 1; for n >= 1, a(n) = A000005(2*n^2 - 1).
EXAMPLE
For n = 0, {S(j)} = A002315 (the NSW numbers), which satisfies S(j) = 6*S(j-1) - S(j-2), so a(0) = 1.
For n = 1, {S(j)} = A001541, which also satisfies S(j) = 6*S(j-1) - S(j-2), so a(1) = 1.
For n = 2, {S(j)} = A077443, which satisfies S(j) = 6*S(j-2) - S(j-4), so a(2) = 2.
For n = 5, {S(j)} = A106525, which satisfies S(j) = 6*S(j-3) - S(j-6), so a(5) = 3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jon E. Schoenfield, Dec 31 2022
STATUS
approved