40967

Appears in sequences

• Number of trees with n nodes, 2 of which are labeled.at n=10A000243
• Fibonacci sequence beginning 3, 14.at n=18A022125
• Numbers k such that 193*2^k-1 is prime.at n=12A050848
• Concatenation of n^3 and 7.at n=15A061679
• Variation on Ulam numbers: a(1) = 1; a(2) = 2; for n>2, a(n) is smallest (n odd) or largest (n even) new number that is the sum of two distinct earlier terms.at n=39A081025
• Numbers k such that sigma(k) - phi(k) is a 4th power.at n=34A115918
• Numbers k such that sum of divisors of k is a square and a triangular number (A000217). That is, numbers k such that A000203(k) is in A001110.at n=14A232847
• Number of (n+1)X(2+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..2+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=9A233361
• Number of length-(n+1) 0..6 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.at n=8A268325
• Number of nX3 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.at n=15A304258