266275domain: NAppears in sequencesFibonacci sequence beginning 13, 7.at n=22A206611Expansion of Product_{k>=0} (1 + x^(5^k))^(5^(k+1)).at n=26A321357Expansion of Product_{k>=0} (1 + x^(5^k))^(5^(k+1)).at n=29A321357