23190

Appears in sequences

• Convolution of natural numbers with (1, p(1), p(2), ... ), where p(k) is the k-th prime.at n=34A023538
• Numbers whose base-4 representation contains exactly four 1's and four 2's.at n=12A045109
• Expansion of x * f(-x^7) * f(-x^21) / (f(-x) * f(-x^3)) where f() is a Ramanujan theta function.at n=32A226007
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 123", based on the 5-celled von Neumann neighborhood.at n=32A270212
• Number of lone-child-avoiding rooted semi-identity trees with n vertices.at n=19A331966
• Starts of runs of 3 consecutive Pell-Niven numbers (A352320).at n=16A352322