20495

Appears in sequences

• a(n) = T(2*n+1, n+3), T given by A027011.at n=5A027018
• a(n) = greatest number in row n of array T given by A027011.at n=15A027020
• T(n, 2n-9), T given by A027960.at n=10A027971
• a(n) = greatest number in row n of array T given by A027960.at n=15A027977
• Numbers k in which the digits of k^2 appear.at n=30A029774
• Pseudo-random numbers: a (very weak) pseudo-random number generator from the second edition of the C book.at n=22A061364
• Eigenvector of triangle A124428.at n=14A124430
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 5 and 9.at n=40A136901
• Number of additive cyclic codes over GF(4) of length n.at n=12A143695
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1111-1001 pattern in any orientation.at n=12A146926
• 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, -1, -1), (0, 0, 1), (0, 1, 1), (1, 1, 0)}.at n=8A151033
• Number of (n+1)X(n+1) -7..7 symmetric matrices with every 2X2 subblock having sum zero and one, three or four distinct values.at n=3A211447
• Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 5.at n=32A244459
• a(n) = n^3 + (n+1)*(n+2).at n=27A270109
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 214", based on the 5-celled von Neumann neighborhood.at n=17A279939
• a(n) = 3*a(n-1) - 3*a(n-2) + 3*a(n-3) - 3*a(n-4) + a(n-5) for n >= 1, where a(0) = 2, a(1) = 4, a(2) = 7. a(3) = 11, a(4) = 20.at n=15A288380