77861

Appears in sequences

• Number of distinct nonnegative integers that can be generated by an expression containing n binary operators (any of add, subtract, multiply and divide) whose operands are any integer between 1 and 9; parenthesis allowed.at n=6A181960
• Numbers k such that 3^k + 10 is prime.at n=31A217137
• Number of ordinary double points of a family of threefolds.at n=19A294604