22178

Appears in sequences

• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 0, 1, 2, 0.at n=18A025251
• Numbers whose base-3 representation has exactly 10 runs.at n=13A043590
• Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 9.at n=31A043807
• Numbers n such that number of runs in the base 3 representation of n is congruent to 0 mod 10.at n=13A043815
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.at n=10A148363
• Row sums of A186430.at n=11A186431
• Numbers n such that n and n+1 are terms in A187086.at n=4A187095
• Number of partitions of n such that (greatest part) + (least part) < number of parts.at n=41A237822
• The number of edges in a graph induced by a regular drawing of K_{n,n}.at n=16A290132
• Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + x^(k*j))^j).at n=19A302550
• First occurrence of difference n between two consecutive terms of A000404. a(n) gives the upper term. The lower term is A355237.at n=17A355238
• Numbers with arithmetic derivative which is a palindromic prime number (A002385).at n=37A359332
• Numbers whose square and cube taken together contain each decimal digit at least twice.at n=4A363909
• Smallest number k >= 1 starting a run of n numbers i = k..k + n - 1 for which i and its digit-reverse are not coprime, while k+n and its digit-reverse are coprime.at n=10A390629