login
A031265
a(n)=(# 1's)-(# 0's) in first n terms of A031253.
1
1, 1, 2, 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 4, 4, 4, 5, 4, 3, 4, 3, 3, 4, 3, 3, 4, 5, 6, 7, 8, 8, 9, 9, 8, 9, 9, 9, 10, 10, 10, 11, 11, 12, 13, 13, 13, 14, 14, 13, 14, 14, 14, 15, 15, 15, 15, 14, 15, 15, 14, 14, 14, 15, 14, 14, 15, 15, 15, 16
OFFSET
1,3
MATHEMATICA
Accumulate[Flatten[Table[IntegerDigits[2n-1, 5]/.{0->-1, 2->0, 3->0, 4->0}, {n, 60}]]] (* Harvey P. Dale, Jan 14 2024 *)
CROSSREFS
Sequence in context: A262868 A342097 A259357 * A029202 A173894 A353533
KEYWORD
nonn
STATUS
approved