19177

Appears in sequences

• a(n) = Sum{a(k): k=0,1,2,...,n-4,n-2,n-1}; a(n-3) is not a summand; initial terms are 1,3,3.at n=16A049871
• Number of even nontotients not exceeding 2^n.at n=15A072077
• Number of cubic graphs on 2n nodes with nontrivial automorphism group.at n=7A204328
• The least nonsquare number s having exactly n twos in the periodic part of the continued fraction of sqrt(s).at n=39A206582
• Number of length 3 1..(n+2) arrays with no leading or trailing partial sum equal to a prime.at n=41A254206
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 565", based on the 5-celled von Neumann neighborhood.at n=25A272945
• Number of parts in all partitions of n in which no part occurs more than seven times.at n=26A320610
• Partition the decimal expansion of Pi into non-overlapping strings of length 10: 3141592653, 5897932384,..; a(n) is the position of the strings where digits are different from each other.at n=7A329368
• Number of 4 element sets of distinct integer sided rectangles that fill an n X n square.at n=33A387171