197542domain: NAppears in sequencesSelf-convolution omits 1's at positions of triangular numbers less one.at n=34A105613Self-convolution of A105613.at n=27A105614Sum of the levels of the first leaf (in the preorder traversal) over all hex trees with n edges.at n=7A126187Numbers k such that 3^k + 28 is prime.at n=31A219046