30215

Appears in sequences

• Convolution of (1, p(1), p(2), ...) and composite numbers.at n=31A023627
• "DHK" (bracelet, identity, unlabeled) transform of 1,0,1,0,... (odd).at n=30A032243
• Number of zero-sum -4..4 arrays of n elements with first through fourth differences also in -4..4.at n=9A201435