This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A355429 #44 Apr 21 2024 22:11:44 %S A355429 1,2,3,4,5,8,6,9,13,21,7,14,22,34,55,10,15,35,56,89,144,11,23,36,90, %T A355429 145,233,377,12,24,57,91,234,378,610,987,16,25,58,146,235,611,988, %U A355429 1597,2584,17,37,59,147,379,612,1598,2585,4181,6765,18,38,92,148,380,989 %N A355429 Square array T(n, k), n >= 0, k > 0, read by antidiagonals, where T(0, k) = A001906(k) for k > 0 and where T(n, k) = n - A130312(n) + A000045(2k + A072649(n)) for n > 0, k > 0. %C A355429 Each positive integer occurs exactly once, so this sequence is a permutation of the natural numbers. %H A355429 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A355429 T(0, k) = A001906(k) for k > 0. %F A355429 T(n, k) = n - A130312(n) + A000045(2k + A072649(n)) for n > 0, k > 0. %e A355429 Square array begins: %e A355429 1, 3, 8, 21, 55, 144, 377, 987, ... %e A355429 2, 5, 13, 34, 89, 233, 610, 1597, ... %e A355429 4, 9, 22, 56, 145, 378, 988, 2585, ... %e A355429 6, 14, 35, 90, 234, 611, 1598, 4182, ... %e A355429 7, 15, 36, 91, 235, 612, 1599, 4183, ... %e A355429 10, 23, 57, 146, 379, 989, 2586, 6767, ... %e A355429 11, 24, 58, 147, 380, 990, 2587, 6768, ... %e A355429 12, 25, 59, 148, 381, 991, 2588, 6769, ... %e A355429 16, 37, 92, 236, 613, 1600, 4184, 10949, ... %o A355429 (PARI) b1(n)=local(m); if(n<1, 0, m=0; until(fibonacci(m)>n, m++); m-2) \\ A072649 %o A355429 T(n, k)=if(n==0, fibonacci(2*k), n - fibonacci(b1(n)) + fibonacci(2*k + b1(n))) %Y A355429 Cf. A000045, A001906, A072649, A130312. %K A355429 nonn,tabl %O A355429 1,2 %A A355429 _Mikhail Kurkov_, Jul 20 2022 [verification needed]