A067094 Floor[X/Y] where X = concatenation in decreasing order of (n+1)-st odd number through the 2n-th odd number and Y = concatenation in increasing order of first n odd numbers.

3, 5, 8, 1115, 141185, 170938, 200692, 230447, 260202, 289956, 319711, 349465, 379220, 408974, 438729, 468483, 498238, 527993, 557747, 587502, 617256, 647011, 676765, 706520, 736274, 7592691, 788748988, 81823548335, 8477219785398

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..2720

Example

a(4)= floor[1513119/1357] =floor[1115.047162859248341930729550479] = 1115.

Maple

f:= proc(n) local k; floor(parse(cat(seq(2*k-1, k=2*n .. n+1, -1)))/parse(cat(seq(2*k-1, k=1..n)))) end proc:
map(f, [$1..50]); # Robert Israel, Nov 06 2024

Mathematica

f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[ToString[2n + 2k - 1], x]; y = StringJoin[y, ToString[2k - 1]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]/10]] ); Table[ f[n], {n, 1, 32} ]

Crossrefs

Cf. A067088, A067089, A067090, A067091, A067092, A067093.

Sequence in context: A174442 A109342 A121371 * A272235 A058642 A258086

Adjacent sequences: A067091 A067092 A067093 * A067095 A067096 A067097

Keyword

easy,nonn,base,look

Author

Amarnath Murthy, Jan 07 2002

Extensions

More terms from Robert G. Wilson v, Jan 09 2002

Definition corrected by Robert Israel, Nov 06 2024

Status

approved